Locking mechanism for elevator-gates.



F. BARLOW.

LOCKING IVIECHANISM FOR ELEVATOH GATES. APPLICATION FILED OCT. 23 1913.

1,155,870. Patented oet. 5,1915] 3 SHEETS-SHEET I.

Fay. 4.

Q M. @Waan/JW@ F. BARLOW.

LOCKING MECHANISM FOR ELEVATOR GATES.

APPLICATION FILED OCT. 23. 1913.

Patented Oct. 5, 1915.

3 SHEETS-SHEET 2 uRAPH C0..W^SHINGToN D c F. BARLOW.

LOCKING MECHANISM FOR ELEVATOR GATES. APPLICATION FILED ocT. 23. 1913.

1,155,8'70Q Patented 0III.5,1915.

3 SHEETSw-SHEET 3.

Cil

FRANKBARLOW, or LONDON, ENGLAND.

LOCKING MECHANISM Foie ELnvAToR-GATES.

mettete.

iipplioatioii iiled oo'tote'r lala. serial No. 796,810;

T0 @ZZ who/nt t mag/concern Be it known that I, FANK BAnnovv, of 6 Medina road, Fiiisbury Park, London, Enig"- land., engineer, subjeot of the King of England, have invented certain new anduseiul Improvements Looking Meehanislns for Elevator-Gates, of which the following a specification, referentie being had therein to the'. aoompailying drawing.

ing the eeiety looking' methe'iiiieih the looked position. Eig. 4 ie a veitieal eeotioi'i on line 4 4@ of Fig. 3, Fi'g. 'shows a sultehle' ioiiii of eliiliiighoit foi' ewiiigiiig dooie'.

Fig. t represente the 'o oiiiieetioiis for a push# biittoih Syste'iii or ooiitrol.

The eliiiiiig or collapsible' gate o, oeiiiee upon the front picket a looking ath o hayiii'g iiiiileieut heele or hohl; b1; The look easing e ie elotteol at e1 for the passageof this beak; withiii thie oase the-ie lrieY iiioiiiite'ol a eliiiahle holt l giiied iipoii Statie of iiie d1; The neliiiiiig looltr l has a lloiigitu' ihofl el'ojt ol? through whiz-iii thi-beak of thelooliiiig hatch b passes', one eiiil of this'4 slot foiiiiih'g" e ledge d3 over whieh theheek ie hooliedjiii the olose'oi po'eitioii he ehowiifiii Fig. 3. The other eiid of the slot l2 ieeeives thejeiiti'eiiijityel oi the' hoiizoiitel' oi studeer Contacts g to iihieii the ooiitiolliiig' or filo-tor starting circuit coigheetioiie are' led.

Iii theY 'shank of; the looking catch b" inimediately beh'iiiy the iiiiereiit beak, there" le provided a sliding pin whij'ch is capable of.

a l'iiiiitei1 vertical movement thriighaiiole' or so'eket j *ii the shank. When thebali b1, of the lekiiig eaten passies' over the ledge d Specification of Letters Patent.

rateiiteoi oet. 5.11915.

of the` `sliding bolt eZ, the latter in rising behind the vundercut beak pushes up the vertical which in its turn raises theV extremity elqo the switch lever and soroloses the circuit upon the studs g through the fingers f. ZThe upward movement of( the vertical pin It carriesl it beyond the 4upper end theslot c? and thereby aliordsali additio'il'al safeguard so that a' double looking action is provided. V e I n y Y vIn order to vopen ythe gate or door, itis lirstnecessary that the beak b1 of the looking catch be released by a downward movement of the sliding bolt cZ. This movement positively operates the switch-lever e( to break the oireuit at 7" g before the beak b1 is released; at the same time the vertical pin tis pushed downward by the extremity. e1

' thi-o1lghits socket j ill the shank of the looking oateh. When the bolt is down at the bottom of its stroke as seen in Fig. 1, the looking oaitoh Z9 can be Withdrawn through the eio'e z2 o1 iii the holt end in the loolt eee ig respeotively,' leaving the switch lever e' engaged by the sliding b'o'lt with the contacts f in' the open position;v .f Y

lt will lie understood that in applying the invention tov a hinged door", 'the looking Catch iipon the latter will enter theY 100k @21S- ing not through an openingforslot (as 01) in the side butthrough opening the front or izaceof the easing. lnthis oase theA looking bolt CZ may be arranged as shown in Fig. 5.with a gapcZ4c in one side of the slot Z2 affording at the bottonii a ledge Z3 Wliioh iig-agee the loohiiig' piii t2 eiiol the door oatehas indicated in dotted lines. The look ie iele'iie'ed hy lowering the Sliding holt, as alre'ady desoribed. A` y The 'sliding biolt al isv operated by means of Va tappet Zo mounted upon the spindle Z1 of an ain Zl'carrying roller `Z2` which projects in line withV a striker m. carried u'ponuthe liftr Cage or the like. This Striker isA movable under the action of the Cage-Controlling device, for example by means ofthe solenoid 6,' wllioh normally retttiis'j'the'striker m out of Contact with the roller-ttedqarins Z Z lof the several entraliees.` replresente diaglaliiinaticallythe eleetrioztl Coilneotio-ns for controlling' the eirouitsl'w'lfhe solenoid 0 is'oonneoted series the ina-in ontrolling oiroilit and thepp'ush ,button yoirollit,4 these two'being' parallel to one"l another. The'push button circuit eX- teds :from -lthrough i! to olie'or the has lifted, o, 7) and r are in series.

other of the push-buttons, Q, thence to p, through o and to As soon as this current raises the armature of y?, the main controlling circuit is established from -lthrough S, 7, g, a, (fw), and 1' (one or other), to p as before, and then through o to at starting, and then after the lever arm, t,

The relays j? p are connected to the respective push-buttons Q o', which are located at the several floors or landings. rlhe operation of a relay by its push-button circuit energizes the main controlling circuit through the same relay p and corresponding circuitbreaker r, and through the several gateswitches f g which therefore must all be in the closed position with their respective gates locked before this main controlling circuit is completed. The circuit breakers r, r are employed to open or close the motor circuit and they therefore control the motor circuit in the well known manner. While the lift is running, the solenoid, 0, is in series with the circuit breakers, r, 1^, and therefore when the circuit is opened, e. g. by opening the switch, the lift cage stops and the striker', m, falls into the engaging position. A stop button s in the controlling circuit is provided for stopping the cage.

The lever arm t of the starting resistance pr rheostat of the motor (not shown) is operated by the coil u which also breaks the push-button circuit at o as soon as its armature u1 moves in consequence of the energization of this coil., A resistance w is provided to reduce the current through this coil when the movement of its armature is completed.

lf the solenoid or control circuit is opened intentionally to stop the elevator or from any cause, the striker then falls forward to the position shown in dotted lines in Fig. 8 so as to contact with the next of the rollerfitted arms and stop the cage at that level. lThe striker is preferably arranged vertically and supported by two or more hinged links m1 in the manner of a parallel ruler; one of the links may be formed as a bell crank having its other arm m2 connected to the armature of the solenoid o. rlhe striker is allowed to fall by an automatic-release of the solenoid at the floor at which the car is to stop. rlhe arm Z will then be raised, the switch opened, and the gate unlocked.

Upon closing the gate, the catch b1 enters into the casing as shown in Fig. l, depressing if necessary the bolt CZ; when the striker m returns to its normal position toward the cage, for example by the energization of the solenoid 0 consequent upon the actuation of a push-button. this allows the lever Z to fall under the influence of gravity, so raising the bolt Z to lock the gate and close the gate-switch, as above described. It will be noted therefore that the improved double locking mechanism fulfils the following requirementsz-The cage cannot be started or the controlling circuit closed unless all the gates are locked. The gates cannot be opened while the cage is moving nor unless the cage is standino` opposite the respective entrance. Should any working` part fail, either the elevator would not work or the gate could not be opened. No springs are necessary. Should the brake fail or break, the vertical pin would prevent the gate or door from being opened. Should the solenoid circuit be broken c. g. by failure of the winding, the lock would be released, the cage would stop on arrival at the next floor, and the elevator could not be re-started until the solenoid had been repaired. rlhe solenoid may however' be totally inclosed.

The lock and switch automatically adjust themselves for wear. so that if undue wear should take place, the elevator' cannot be started without the gates being locked, because starting is dependent upon the sliding pin closing the circuit. YWhen in that position for closing the circuit the gate is locked. i

ln locking mechanisms of the usual type, when the gate is closed and the controller operated to start the cage, the locking of the gate takes place after the cage has traveled a sufiicient distance to allow the customary controlling rail or incline on the cage to move away from the trigger lever or striker arm projecting into the well. Moreover, the incline engages the lever at each floor or gate so that each gate in turn is unlocked and may therefore be opened at the time the cage passes this position even though it is not stopping at that floor.

By the present invention the locking of the gate is made to take place not as the final of a series of operations but as one of a number of interconnected and substantially simultaneous steps, each of which determines in a definite manner the neXt step in the action. Thus the actuation of the controlling` device, push-button or the like, operates the striker or incline and allows the trigger lever to fall by its own weight; this lever raises the sli ding bolt which locks the gate; the rise of the locking bolt, provided the gate-catch is in position and properly engaged by the bolt, closes the contacts of the gate-switch; the controlling circuit is thereby completed at that gate, and the cage will be allowed to start, provided the circuit is also completed at all other points.

According to the present invention, the gate is automatically locked prior to the closing of the controlling circuit to start the cage or the like; the locking catch upon the sliding gate or the like, which is provided with .a beak or the likeadapted to enter into the lock casing through a slot in the face of the latter, is enga ed by a locking bolt, the moveinent of w 'ich is deter-v mined by the actuation of thel controlling device so as to engage a bell 'crank levei'e` into the closed position by-the corresponding movement of the bell crank.

Having thus described my invention, what I claim as such and desire to secure by Letters Patent isrl. A locking mechanism for elevator gates, comprising in combination with a cage a gate catch, means for engaging said gate catch, a movable member mounted upon said gate-catch, said movable member actuated by said engaging means, and asi'vitch operated by the actuation of said movable member, said switch serving to start and stop said cage.

2. A locking mechanism for elevator gates, comprising iii combination with a cage a gate-catch, means for engaging said gatecatch, amember movably mounted uponsaid gate-catch, said movable meinbei1 actuated by said engaging means, and a switch serving to start and stop said cage, said switch being operated in one direction by said movable member and in the other .direction by said engaging means.

3. A locking mechanism for elevator gates, comprising in combination with a cage a gate-catch, means for engaging said gatecatch, and a` switch determining the movements of the cage, said switch being operated by said engaging meanstthe operation in one direction being conditional upon the engagement of said gate-catch.

et. A locking mechanism for elevator gates, comprising in Combination with a cage means for controlling said cage, a striker, said striker being mounted upon the cage and being movable under the action of said controlling means, a lever adapted to be actuated by said striker in one'position of the latter, a gate-catch, means for engaging said gate-catch, said engaging means operated by said lever, and a switch locking mechanism for elevator gates, comprising in combination with a cage a gate-catch, a bolt adapted to engage said gate-catch, a pin loosely mounted in said gate catch, said pin being actuated by said switch serving to start `and stop said tage,-v

and an arm operating said switch, said arm entering between an extremity of 'said slidable pin and a portion of said bolt.-

7 A locking mechanism "for elevator gates, comprising in combination with a cagemeans for controlling said cage, agatecatch, a bolt adapted to engage said lgatecatch, a movable member mounted upon said gate-catch, said member actuated by the engageinent of ysaidl bolt with said gatec`atch,

a striker, said striker being mounted upon the cage and being movable underthe action of said cage-controlling means, a lever v adapted to be actuated by said striker in one lposition of the latter, a tappet engaging said bolt, said tappet connected to saidlever,

and a switch serving to start and stop said 1 cage, said switch being operated by said bolt and said movable member.

8. A locking mechanism for elevator@ gates, comprising in combination with a cage means controlling' said cage, a; gatecatch, a bolt adapted to engage said gatecatcli, a movable meiri'ber mounted upon said gate-catch, said member actuated by the engagement of said bolt with said gate-catch,

a striker, said striker being mounted upon the cage and being movable under the action 'of said cage-controlling means, a lever adapted to be actuated by said striker in onel position of the latter, a tappet engaging said bolt, said tappet connectedto said lever, n

and a switch serving to start and stop said cage, said switch being operated by said bolt and said movable member and the operation in one direction being controlled by said movable member and thus being-conditional upon the engagement of said gate-catch.

9. A locking mechanism for elevator gates, comprising in combination with a cage, means for controlling said cage, a gatecatch, a bolt adapted to engage said gatecatch, a movable member mounted upon said gate-catch, said member actuated by the engagement of said bolt with said gate-catch, l

a striker, said striker being mounted upon vthe cage, and being movable under the action of said cage-controlling means, a lever adapted to be actuted by said striker in one position of the latter, a tappet engaging said bolt, said tappet connected to said y lever, and a switch serving to start and stop said cage, said switch being operable in one direction by said bolt and inthe other direc- Y tion to start the cage through said movable member.

l0. A locking mechanism for elevator gates, comprising in combination with a cage a gate-catch, bolt adapted to engage said gate-catch, a movable member loosely mounted in said gate-catch, said member being actuated by said bolt in engaging said gate-catch, a switch lever, an arm of said switch lever engaged by said bolt and said movable member, and contacts controlled by said switch lever.

ll. A locking mechanismk for elevator gates, comprising in combination with a cage a gate-catch, a bolt adapted to engage said gate-catch, a pin slidably mounted in said gate-catch, said slidable pin being actuated by said bolt in engaging said gate-catch, and a switch lever serving to start and stop said cage, an arm of said lever entering between an extremity of said slidable pin and a portion ot said bolt, said lever arm being thereby operated in one direction to stop the cage by the bolt directly and in the other direction to start the cage through the intermediation oi the slid-able in. Y l2. A locking mechanism for elevator gates, comprising in combination with a cage a gate-catch, a lock-casing through an opening into which said gate-catch enters, means for engaging said gate-catch, a movable member mounted upon said gate-catch, said movable member actuated by said engaging means, said member movable behind an edge of said opening, and a switch operated by said engaging means, said switch serving to start and stop said cage.

13. A locking mechanism for elevator gates, comprising in combination with a cage a gate-catch, a shank and a hookshaped beak on said gate-cateh, a lock-casing through an opening into which said gate-catch enters, a vertical sliding bolt mounted within said casing, guide-pins for said bolt, said bolt having a vertical slot into which said gate-catch enters, a ledge forming the bottom of said slot, said ledge engaging behind said hook and contacting with said shank, a vertically slidable pin mounted in said shank, said pin lying within said slot when said gate-catch is engaged by said bolt, a switch lever, an arm of said switch'lever entering between the head oi said pin and the upper extremity of said slot, contact-ngers on said switch lever, Contact studs adapted to be connected by said Contact fingers to start said cage, a cage-controlling device, a striker mounte upon the cage, said striker being movable under the action of said cage-controlling device, a spindle mounted in said lock-casing, a trigger-lever mounted on said soindle, a roller carried at the extremity oi said trigger-lever, said roller adapted to contact with said striker in one position of said lever, and a tappet mounted on said spindie, said tappet engaging said bolt.

14.. The combination with electric terminals, of a movable member for connecting said terminals, a gate-catch, means for engaging said gate-catch, and a sliding pin mounted in said gate-catch, said sliding pin being actuated by the engagement of said gate-catch, and the actuation of said pin operating said movable member.

In testimony whereof l have affixed my signature in presence of two witnesses.

FRANK BARLOW.

Witnesses:

Vieron FALLON FEENY, CYRIL JOSEPH FEENY.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

